Problem with Postfix (1.1.21)

Hello,

i get an error, when i install imscp version 1.1.21

Quote

Setting up postfix (2.9.6-2) ...

Postfix configuration was not changed. If you need to make changes, edit
/etc/postfix/main.cf (and others) as needed. To view Postfix configuration
values, see postconf(1).

After modifying main.cf, be sure to run '/etc/init.d/postfix reload'.

Running newaliases
newaliases: warning: valid_hostname: numeric hostname: srv1
newaliases: fatal: file /etc/postfix/main.cf: parameter myhostname: bad parameter value: srv1
dpkg: error processing postfix (--configure):
subprocess installed post-installation script returned error exit status 75
dpkg: dependency problems prevent configuration of courier-pop:
courier-pop depends on default-mta | mail-transport-agent; however:
Package default-mta is not installed.
Package mail-transport-agent is not installed.
Package postfix which provides mail-transport-agent is not configured yet.

dpkg: error processing courier-pop (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of courier-pop-ssl:
courier-pop-ssl depends on courier-pop; however:
Package courier-pop is not configured yet.

dpkg: error processing courier-pop-ssl (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of courier-imap:
courier-imap depends on default-mta | mail-transport-agent; however:
Package default-mta is not installed.
Package mail-transport-agent is not installed.
Package postfix which provides mail-transport-agent is not configured yet.

dpkg: error processing courier-imap (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of courier-imap-ssl:
courier-imap-ssl depends on courier-imap (>= 1.3.7-3); however:
Package courier-imap is not configured yet.

dpkg: error processing courier-imap-ssl (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
postfix
courier-pop
courier-pop-ssl
courier-imap
courier-imap-ssl
E: Sub-process /usr/bin/dpkg returned an error code (1)

iMSCP::Debug::END: Exit code: 100

Display More

Can someone help me, pls?

Thank you!

I installed released version.
I will report the bug.

Thank you!